Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /********************************************************************* |
| 2 | * |
| 3 | * Filename: timer.c |
| 4 | * Version: |
| 5 | * Description: |
| 6 | * Status: Experimental. |
| 7 | * Author: Dag Brattli <dagb@cs.uit.no> |
| 8 | * Created at: Sat Aug 16 00:59:29 1997 |
| 9 | * Modified at: Wed Dec 8 12:50:34 1999 |
| 10 | * Modified by: Dag Brattli <dagb@cs.uit.no> |
| 11 | * |
| 12 | * Copyright (c) 1997, 1999 Dag Brattli <dagb@cs.uit.no>, |
| 13 | * All Rights Reserved. |
| 14 | * Copyright (c) 2000-2002 Jean Tourrilhes <jt@hpl.hp.com> |
| 15 | * |
| 16 | * This program is free software; you can redistribute it and/or |
| 17 | * modify it under the terms of the GNU General Public License as |
| 18 | * published by the Free Software Foundation; either version 2 of |
| 19 | * the License, or (at your option) any later version. |
| 20 | * |
| 21 | * Neither Dag Brattli nor University of Tromsø admit liability nor |
| 22 | * provide warranty for any of this software. This material is |
| 23 | * provided "AS-IS" and at no charge. |
| 24 | * |
| 25 | ********************************************************************/ |
| 26 | |
| 27 | #include <asm/system.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <linux/delay.h> |
| 29 | |
| 30 | #include <net/irda/timer.h> |
| 31 | #include <net/irda/irda.h> |
| 32 | #include <net/irda/irda_device.h> |
| 33 | #include <net/irda/irlap.h> |
| 34 | #include <net/irda/irlmp.h> |
| 35 | |
| 36 | extern int sysctl_slot_timeout; |
| 37 | |
| 38 | static void irlap_slot_timer_expired(void* data); |
| 39 | static void irlap_query_timer_expired(void* data); |
| 40 | static void irlap_final_timer_expired(void* data); |
| 41 | static void irlap_wd_timer_expired(void* data); |
| 42 | static void irlap_backoff_timer_expired(void* data); |
| 43 | static void irlap_media_busy_expired(void* data); |
| 44 | |
| 45 | void irlap_start_slot_timer(struct irlap_cb *self, int timeout) |
| 46 | { |
| 47 | irda_start_timer(&self->slot_timer, timeout, (void *) self, |
| 48 | irlap_slot_timer_expired); |
| 49 | } |
| 50 | |
| 51 | void irlap_start_query_timer(struct irlap_cb *self, int S, int s) |
| 52 | { |
| 53 | int timeout; |
| 54 | |
| 55 | /* Calculate when the peer discovery should end. Normally, we |
| 56 | * get the end-of-discovery frame, so this is just in case |
| 57 | * we miss it. |
| 58 | * Basically, we multiply the number of remaining slots by our |
| 59 | * slot time, plus add some extra time to properly receive the last |
| 60 | * discovery packet (which is longer due to extra discovery info), |
| 61 | * to avoid messing with for incomming connections requests and |
| 62 | * to accomodate devices that perform discovery slower than us. |
| 63 | * Jean II */ |
| 64 | timeout = ((sysctl_slot_timeout * HZ / 1000) * (S - s) |
| 65 | + XIDEXTRA_TIMEOUT + SMALLBUSY_TIMEOUT); |
| 66 | |
| 67 | /* Set or re-set the timer. We reset the timer for each received |
| 68 | * discovery query, which allow us to automatically adjust to |
| 69 | * the speed of the peer discovery (faster or slower). Jean II */ |
| 70 | irda_start_timer( &self->query_timer, timeout, (void *) self, |
| 71 | irlap_query_timer_expired); |
| 72 | } |
| 73 | |
| 74 | void irlap_start_final_timer(struct irlap_cb *self, int timeout) |
| 75 | { |
| 76 | irda_start_timer(&self->final_timer, timeout, (void *) self, |
| 77 | irlap_final_timer_expired); |
| 78 | } |
| 79 | |
| 80 | void irlap_start_wd_timer(struct irlap_cb *self, int timeout) |
| 81 | { |
| 82 | irda_start_timer(&self->wd_timer, timeout, (void *) self, |
| 83 | irlap_wd_timer_expired); |
| 84 | } |
| 85 | |
| 86 | void irlap_start_backoff_timer(struct irlap_cb *self, int timeout) |
| 87 | { |
| 88 | irda_start_timer(&self->backoff_timer, timeout, (void *) self, |
| 89 | irlap_backoff_timer_expired); |
| 90 | } |
| 91 | |
| 92 | void irlap_start_mbusy_timer(struct irlap_cb *self, int timeout) |
| 93 | { |
| 94 | irda_start_timer(&self->media_busy_timer, timeout, |
| 95 | (void *) self, irlap_media_busy_expired); |
| 96 | } |
| 97 | |
| 98 | void irlap_stop_mbusy_timer(struct irlap_cb *self) |
| 99 | { |
| 100 | /* If timer is activated, kill it! */ |
| 101 | del_timer(&self->media_busy_timer); |
| 102 | |
| 103 | /* If we are in NDM, there is a bunch of events in LAP that |
| 104 | * that be pending due to the media_busy condition, such as |
| 105 | * CONNECT_REQUEST and SEND_UI_FRAME. If we don't generate |
| 106 | * an event, they will wait forever... |
| 107 | * Jean II */ |
| 108 | if (self->state == LAP_NDM) |
| 109 | irlap_do_event(self, MEDIA_BUSY_TIMER_EXPIRED, NULL, NULL); |
| 110 | } |
| 111 | |
| 112 | void irlmp_start_watchdog_timer(struct lsap_cb *self, int timeout) |
| 113 | { |
| 114 | irda_start_timer(&self->watchdog_timer, timeout, (void *) self, |
| 115 | irlmp_watchdog_timer_expired); |
| 116 | } |
| 117 | |
| 118 | void irlmp_start_discovery_timer(struct irlmp_cb *self, int timeout) |
| 119 | { |
| 120 | irda_start_timer(&self->discovery_timer, timeout, (void *) self, |
| 121 | irlmp_discovery_timer_expired); |
| 122 | } |
| 123 | |
| 124 | void irlmp_start_idle_timer(struct lap_cb *self, int timeout) |
| 125 | { |
| 126 | irda_start_timer(&self->idle_timer, timeout, (void *) self, |
| 127 | irlmp_idle_timer_expired); |
| 128 | } |
| 129 | |
| 130 | void irlmp_stop_idle_timer(struct lap_cb *self) |
| 131 | { |
| 132 | /* If timer is activated, kill it! */ |
| 133 | del_timer(&self->idle_timer); |
| 134 | } |
| 135 | |
| 136 | /* |
| 137 | * Function irlap_slot_timer_expired (data) |
| 138 | * |
| 139 | * IrLAP slot timer has expired |
| 140 | * |
| 141 | */ |
| 142 | static void irlap_slot_timer_expired(void *data) |
| 143 | { |
| 144 | struct irlap_cb *self = (struct irlap_cb *) data; |
| 145 | |
| 146 | IRDA_ASSERT(self != NULL, return;); |
| 147 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); |
| 148 | |
| 149 | irlap_do_event(self, SLOT_TIMER_EXPIRED, NULL, NULL); |
| 150 | } |
| 151 | |
| 152 | /* |
| 153 | * Function irlap_query_timer_expired (data) |
| 154 | * |
| 155 | * IrLAP query timer has expired |
| 156 | * |
| 157 | */ |
| 158 | static void irlap_query_timer_expired(void *data) |
| 159 | { |
| 160 | struct irlap_cb *self = (struct irlap_cb *) data; |
| 161 | |
| 162 | IRDA_ASSERT(self != NULL, return;); |
| 163 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); |
| 164 | |
| 165 | irlap_do_event(self, QUERY_TIMER_EXPIRED, NULL, NULL); |
| 166 | } |
| 167 | |
| 168 | /* |
| 169 | * Function irda_final_timer_expired (data) |
| 170 | * |
| 171 | * |
| 172 | * |
| 173 | */ |
| 174 | static void irlap_final_timer_expired(void *data) |
| 175 | { |
| 176 | struct irlap_cb *self = (struct irlap_cb *) data; |
| 177 | |
| 178 | IRDA_ASSERT(self != NULL, return;); |
| 179 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); |
| 180 | |
| 181 | irlap_do_event(self, FINAL_TIMER_EXPIRED, NULL, NULL); |
| 182 | } |
| 183 | |
| 184 | /* |
| 185 | * Function irda_wd_timer_expired (data) |
| 186 | * |
| 187 | * |
| 188 | * |
| 189 | */ |
| 190 | static void irlap_wd_timer_expired(void *data) |
| 191 | { |
| 192 | struct irlap_cb *self = (struct irlap_cb *) data; |
| 193 | |
| 194 | IRDA_ASSERT(self != NULL, return;); |
| 195 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); |
| 196 | |
| 197 | irlap_do_event(self, WD_TIMER_EXPIRED, NULL, NULL); |
| 198 | } |
| 199 | |
| 200 | /* |
| 201 | * Function irda_backoff_timer_expired (data) |
| 202 | * |
| 203 | * |
| 204 | * |
| 205 | */ |
| 206 | static void irlap_backoff_timer_expired(void *data) |
| 207 | { |
| 208 | struct irlap_cb *self = (struct irlap_cb *) data; |
| 209 | |
| 210 | IRDA_ASSERT(self != NULL, return;); |
| 211 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); |
| 212 | |
| 213 | irlap_do_event(self, BACKOFF_TIMER_EXPIRED, NULL, NULL); |
| 214 | } |
| 215 | |
| 216 | |
| 217 | /* |
| 218 | * Function irtty_media_busy_expired (data) |
| 219 | * |
| 220 | * |
| 221 | */ |
| 222 | void irlap_media_busy_expired(void* data) |
| 223 | { |
| 224 | struct irlap_cb *self = (struct irlap_cb *) data; |
| 225 | |
| 226 | IRDA_ASSERT(self != NULL, return;); |
| 227 | |
| 228 | irda_device_set_media_busy(self->netdev, FALSE); |
| 229 | /* Note : the LAP event will be send in irlap_stop_mbusy_timer(), |
| 230 | * to catch other cases where the flag is cleared (for example |
| 231 | * after a discovery) - Jean II */ |
| 232 | } |